The Mastic Doctor team standing beside their branded vans outside an office building
Kent · England

Fire Stopping in Penshurst

Fire-rated and intumescent sealing of service penetrations and linear gaps in Penshurst and across Kent. CHAS accredited and fully insured, with a 12-month guarantee.

  • Fire stopping installed outside its tested range
  • Fire seals cut back for extra cables and never reinstated
  • Unsealed openings around new pipes and cables
1
Send details
Photos, drawings or a schedule, or we visit.
2
Get a quote
A fixed quote for the work, with the scope in writing.
3
We seal
Failed joints cut out, faces prepared, new sealant laid.
4
Guaranteed
Backed by a 12-month workmanship guarantee.
London, the South East & Scotland
CHAS accredited
£5m PL insurance

Fire stopping in Penshurst

Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.

Fire stopping in Penshurst, done properly

No fire sealant works on its own: the evidence covers a specific product, wall or floor type, service, gap, depth and backing. Before we seal anything, we check the opening against the detail it is meant to follow, and raise it with you if it falls outside. We work on pipe penetrations, cable penetrations and small duct penetrations where the tested detail allows, and what we’re called in for most is penetration schedules that need working through and unsealed joints where partitions meet the slab. Most enquiries from Penshurst start with one failed joint and grow into a wider look at the building: we look at the rest while we are there and tell you what we find.

A job near Penshurst is typically planned around one visit, with the specification and photos sent in advance. We install to the specification and the manufacturer’s guidance, leaving design and sign-off with the designer and building control.

Building owners and contractors get the same cover: twelve months on the work we carried out. It doesn’t extend to damage, faults in the building or work by others, and we are upfront about that.

Location
Penshurst (TN11)
Wider area
Kent
Guarantee
A 12-month guarantee
Quote
Quoted before any work starts
Call
01277 525 020
Last updated
3 November 2026
The Mastic Doctor team beside their liveried vans in front of an office building

Building owners, agents and FMs in Penshurst

We work for building owners and managing agents on sealant work across single buildings or whole portfolios around Penshurst. One quote can cover more than one site, which keeps the paperwork simple.

CHAS accredited and a Constructionline member, we make supplier vetting simple. We are fully insured, and our insurance certificate can go with the quote.

Surface by surface

Cables and cable bundles

Cable penetrations are frequently sealed with fire-rated sealant where the detail allows. The detail limits bundle size and the gaps between and around cables.

Plastic pipes

Plastic pipes soften and collapse in a fire. Some intumescent sealants are tested on smaller plastic pipes. We check the pipe material and diameter against the detail before we start.

Cost factors for service penetrations

We price every job individually. The things that drive the figure:

  • How accessible the joints are
  • The total length or number of joints
  • The site’s rules and procedures
  • Distance, for remote addresses

Access often affects the price as much as the sealing: easy-to-reach joints are quicker than those that need equipment to get to. Mention the access as part of your enquiry.

Before you send an enquiry

Diagnosis starts before we arrive. Let us know:

  • Asbestos survey details if the building is older
  • Rough lengths or quantities, or drawings if you have them
  • Clear photographs of the problem areas
  • Anything awkward about access or site hours

Send details, get a quote, we seal, guaranteed: that’s how every job runs. The first step is to phone 01277 525 020 or email drawings and photos with what you know.

Penshurst: questions and answers

Is Penshurst off your patch?

No. Small places get the same service as large ones. We cover Greater London and the counties of the South East. Where we can, we group nearby jobs to make the most of each trip.

Do you cover business parks and estates near Penshurst, such as Speldhurst Business Park?

Yes. We cover Penshurst and the area around it, including industrial estates, business parks and retail parks such as Speldhurst Business Park. Send details of the unit and the work through our quote form for a quick quote.

Are you insured?

Yes. We are fully insured, including public liability cover.

Can you send site paperwork?

Requirements differ from site to site, so list what you need, whether RAMS, insurance or CSCS details, and we will confirm with the quote.

What do BS EN 1366-3 and BS EN 13501-2 mean?

BS EN 1366-3 covers penetration seals and BS EN 1366-4 covers linear joints. Results are classified under BS EN 13501-2, where E is integrity, I is insulation and the number is minutes, as in EI 60. That rating only holds when the product is installed to its tested detail.

Is fire stopping in Scotland covered by different guidance?

Our work covers Greater London, the South East and every Scottish council area. Scotland’s non-domestic Technical Handbook, clause 2.1.14, expects service penetrations to be fire stopped to at least the wall or floor’s fire resistance, with proprietary products tested for the end use.

Can one quote cover more than one building?

Yes. Multi-site work and planned programmes are a core part of the service, with each site phased to suit its occupants.

How a job runs

We bring the products specified for the job, along with primers and backing rod. Joint faces are cleaned back to sound, dry surfaces, the manufacturer’s primer is applied where it’s called for, and the sealant is tooled off neatly. For work around Penshurst, we aim to finish in one visit, so we ask for photos and rough sizes first. Then the right materials arrive with us.

  1. The specification and schedule come first, so we know which details apply.
  2. We plan the sequence of floors, risers and voids with you.
  3. We compare every service penetration with its tested detail before sealing.
  4. Unsuitable material is removed and the opening cleaned.
  5. The specified backing and sealant go in to depth and are finished neatly.
  6. Anything outside the detail is reported to you rather than sealed.

Preparing the site

  • Confirm the product named in the specification
  • Agree which areas must stay open
  • Let building users know which areas are affected

Ask for a quote

A good quote starts with a clear picture: the joints involved, quantities, access and the product called for. Share whatever details you have and we will fill any gaps with a visit.

Get a price

Advice

Fire stopping around Penshurst: how the place shapes the job

In England, Approved Document B covers fire stopping of openings and penetrations. References to the older BS 476 classes are being removed from it from 2 September 2029, after which the European classification, BS EN 13501-2, is the route, subject to transitional arrangements. What we install is set by the specification, and it goes in to the tested detail. Penshurst is about 26 miles from central London. Office refits around the commuter belt bring new cabling through fire-resisting walls.

On a site such as Speldhurst Business Park, which lies south-east of Penshurst, every fit-out that runs new services through a compartment wall leaves penetrations to seal with the specified product. In a hotel such as The Leicester Arms Hotel (under half a mile north-east of Penshurst), new pipework or cabling through bedroom and corridor walls needs sealing with the specified product.

Penshurst is about 5 miles north-west of Royal Tunbridge Wells, in Kent. Penshurst sits inside our coverage, with the same fixed quotes and 12-month guarantee as everywhere else. Penshurst is one of 931 places in Kent on our list for service penetrations. Our London page has more on work in that area.

Work on service penetrations is covered throughout TN11. Among the streets we cover are High Street, The Warren and Beckets Field. If your building is just outside Penshurst, we cover Chiddingstone Hoath (2 miles west), Walter's Green (2 miles south), Chiddingstone Causeway (2 miles north), Fordcombe (2 miles south) and Teasley Mead (3 miles south-west). Further afield, our area takes in Sevenoaks (8 miles north), Royal Tunbridge Wells (5 miles south-east), Tonbridge (5 miles north-east), Kings Hill (12 miles north-east), Paddock Wood (9 miles east) and Southborough (4 miles east).

What’s near Penshurst

We work on buildings around Chiddingstone Castle Park and Gardens and The Leicester Arms Hotel, among other places. Penshurst’s nearest station is Penshurst station, roughly 1.8 miles north. Other landmarks nearby include Tonbridge Cottage Hospital (4.2 miles east) and Chiddingstone Castle (1.8 miles north-west). The countryside around Penshurst includes Broadwater Warren RSPB Reserve and Barden Lake.

Map of Penshurst © OpenStreetMap contributors

Why it’s worth doing now in Penshurst

An open or wrongly sealed service penetration lets fire and smoke reach the next compartment much sooner than the building was designed for. While the openings can be reached, sealing them is normally straightforward. Left until ceilings are closed or a tenant moves in, the same work costs more access and more disruption. One visit to deal with every failing joint makes more sense than several trips to a place like Penshurst. Send photographs of each area and we will quote for the lot.

A quote for service penetrations depends on how many there are, their condition and the access. Call for a quote.

What you get with us

  • Public liability insurance in place
  • One phone line for London, the South East and Scotland
  • Constructionline member
  • 12-month guarantee on workmanship

See how commercial sealant jobs are priced or our accreditations.

What we are called out for in Penshurst

Most open service penetrations are left by later work. New cabling, rerouted pipework or a data route drilled through a riser can leave the hole behind. Over a few years of fit-outs, a wall can collect a lot of these.

Clients usually get in touch after noticing something like this:

  • Fire seals cut back for extra cables and never reinstated
  • Service penetrations left open after M&E works
  • Old intumescent sealant that has split away
  • Head-of-wall gaps with no fire seal

For an estates team at a campus like Canterbury Christ Church University - Salomons, which lies south-east of Penshurst, summer M&E works are usually followed by a round of penetration sealing.

What to look for in a quote

  • How long is the guarantee, and what does it include?
  • Do they follow the manufacturer’s priming guidance?
  • Health and safety accreditation such as CHAS
  • What level of public liability insurance do they hold?

Our contractor checklist

Accreditations

Trusted. Accredited. Insured.